Bob,
You didn't mention the model or manufacturer of your tower.The
best installation involves a genuine tapered bottom section of the
type made to accommodate a ceramic base insulator. Usually when you
find one, you also get the mounting hardware and ball gap that
accompanies it. You have
Hello Bob,
When I’ve modeled a 160 vertical interior to an 80M 4 sq I find the vertical
interacts terribly with the 4 sq. The ‘tower’ would need to be broken up in to
3 sections ... not a simple task... I know there are those that have done this
but I suspect they’ve just put it up and taken th
The base insulator is certainly the most effective way to detune, and
the most efficient way to drive the tower, but it is nice to have the
tower grounded and use shunt feed. You can detune the tower by turning
the bottom section into a parallel-resonant trap during receive,
probably using the
Hi I have decided to put up a 40m tower to use as a transmitting vertical for
1.8mHz out away from in between our other towers and where I can run 1/4 wave
radials all the way around, and will probably use locally available 12" steel
sections with a conical-type pin base. I would like to insulat
Hi John
The concrete is not an insulator. Connect a wire to the top and run it down
about 2-3 feet out from and parallel to the tower and feed it with an L network
against ground radials at the base. You will get RF in your rotor cables if you
run them outside the crank up tower so be sure to b
